Significant Accounting and Reporting Policies - Schedule of Consolidated Statements of Stockholders' Equity (Details) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	May 28, 2022	Feb. 26, 2022	Nov. 27, 2021	Aug. 28, 2021	May 29, 2021	Feb. 27, 2021	Nov. 28, 2020	Aug. 29, 2020	May 30, 2020	Feb. 29, 2020	Nov. 30, 2019	Aug. 31, 2019	May 28, 2022	May 29, 2021	May 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)	$ 21.5	$ 14.4	$ (1.7)	$ (61.3)	$ 8.9	$ 41.5	$ 51.4	$ 72.8	$ (173.6)	$ 37.9	$ 78.7	$ 48.3	$ (27.1)	$ 174.6	$ (8.7)
Retained earnings	693.3				819.3								693.3	819.3
If Reported using LIFO
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)														173.1	(9.1)
Retained earnings					808.4									808.4
If Reported using LIFO | Cumulative effect of accounting changes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Balance at beginning of year												$ 9.0			9.0
Impact of change to FIFO
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net earnings (loss)													8.4	1.5	$ 0.4
Retained earnings	$ 19.3				$ 10.9								$ 19.3	$ 10.9